Subversion Repositories openrisc_2011-10-31

# _ashrsi3.S for Lattice Mico32

# Contributed by Jon Beniston  and Richard Henderson.

#

# Copyright (C) 2009 Free Software Foundation, Inc.

#

# This file is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License as published by the

# Free Software Foundation; either version 3, or (at your option) any

# later version.

#

# This file is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

#

# Under Section 7 of GPL version 3, you are granted additional

# permissions described in the GCC Runtime Library Exception, version

# 3.1, as published by the Free Software Foundation.

#

# You should have received a copy of the GNU General Public License and

# a copy of the GCC Runtime Library Exception along with this program;

# see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

# .

#

/* Arithmetic right shift.  */

        .global __ashrsi3

        .type __ashrsi3,@function

__ashrsi3:

        /* Only use 5 LSBs, as that's all the h/w shifter uses.  */

        andi    r2, r2, 0x1f

        /* Get address of offset into unrolled shift loop to jump to.  */

#ifdef __PIC__

        lw      r3, (gp+got(__ashrsi3_0))

#else

        mvhi    r3, hi(__ashrsi3_0)

        ori     r3, r3, lo(__ashrsi3_0)

#endif

        add     r2, r2, r2

        add     r2, r2, r2

        sub     r3, r3, r2

        b       r3

__ashrsi3_31:

        sri     r1, r1, 1

__ashrsi3_30:

        sri     r1, r1, 1

__ashrsi3_29:

        sri     r1, r1, 1

__ashrsi3_28:

        sri     r1, r1, 1

__ashrsi3_27:

        sri     r1, r1, 1

__ashrsi3_26:

        sri     r1, r1, 1

__ashrsi3_25:

        sri     r1, r1, 1

__ashrsi3_24:

        sri     r1, r1, 1

__ashrsi3_23:

        sri     r1, r1, 1

__ashrsi3_22:

        sri     r1, r1, 1

__ashrsi3_21:

        sri     r1, r1, 1

__ashrsi3_20:

        sri     r1, r1, 1

__ashrsi3_19:

        sri     r1, r1, 1

__ashrsi3_18:

        sri     r1, r1, 1

__ashrsi3_17:

        sri     r1, r1, 1

__ashrsi3_16:

        sri     r1, r1, 1

__ashrsi3_15:

        sri     r1, r1, 1

__ashrsi3_14:

        sri     r1, r1, 1

__ashrsi3_13:

        sri     r1, r1, 1

__ashrsi3_12:

        sri     r1, r1, 1

__ashrsi3_11:

        sri     r1, r1, 1

__ashrsi3_10:

        sri     r1, r1, 1

__ashrsi3_9:

        sri     r1, r1, 1

__ashrsi3_8:

        sri     r1, r1, 1

__ashrsi3_7:

        sri     r1, r1, 1

__ashrsi3_6:

        sri     r1, r1, 1

__ashrsi3_5:

        sri     r1, r1, 1

__ashrsi3_4:

        sri     r1, r1, 1

__ashrsi3_3:

        sri     r1, r1, 1

__ashrsi3_2:

        sri     r1, r1, 1

__ashrsi3_1:

        sri     r1, r1, 1

__ashrsi3_0:

        ret